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It will heat faster with the pump running... sort of. The issue is thermoclines. Water of a particualr temperature has a specific density. Cooler water is more dense than hot water, so hot water tends to rise and cold water tends to sink. This process creates what is called stratification. With the hot water on top, it creates the opportunity for much of that heat to radiate back into the air before it has the chance to transfer some of that heat into the colder temperature water below. If you want to heat the entire pool to a uniform temperature, turn the pump on. If you want the deep end to be colder than the shallow end, leave it off.

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15y ago
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15y ago

i thaught it was to keep the heat in, so run the pump duiring the day with cover off and then cover the pool at night to keep the heat in the pool . the pump heats water by moving it. friction..pool pump repair guy in longwood fl

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15y ago

It would seem that the small amount of friction created by the Impeller turning in the water would help add heat to the Pool Water.

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15y ago

To evenly distribute the water and mix the cold with the warm the pump should be on.

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14y ago

It heats better with the cover on because more heat gets trapped inside..

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11y ago

It is better to leave it on if you are going to not use it for awhile. If you are going to use it soon, don't even both. Follow me on instagram, @steinwagner

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Q: Does a pool heat up faster with the cover on or off?
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Will a black tarp cut in a circle and connected to floating tubes on the outside of the tarp heat ones small pool In hopes to catch the heat rays as they are bouncing out of the pool?

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What time of day do you put the pool cover on?

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